Fire bowl



J. DICKMAN March 19, 1935.

FIRE BOWL' Filed Aug. 31, 1955 In wen 2;

flttorn (y Patented Mar. 19, 1935 FIRE BOWL Joseph Dickman, Cincinnati, Ohio, assignor to The Brick-in-Steel Fire Bowl Company, a corporation of Ohio Application August 31, 1933, Serial No. 687,618

Claims.

The present invention relates to fire bowls for furnaces.

My invention is adapted more particularly for use in the construction of hot air furnaces of the type generally in use for house heating purposes. The principal object of said invention is to .provide a simple, inexpensive and durable fire bowl for a furnace of said type, and one which by reason of the use of a steel drum having a refractory lining such as fire clay or brick, is ideally adapted for use in connection with fuels having great heat intensity, such for instance as coke.

Fire bowls for hot air furnaces as presently constructed consist generally of cast iron which under conditions of great heat is subject to warping and cracking, and may even melt away in sections of intense heat where radiation is not adequately maintained. By means of the present invention the difliculties mentioned are wholly obviated.

A further object of the invention is to provide a fire bowl which is readily adapted for replacement of the damaged or broken bowls of previous installations.

A still further object of the invention is to provide improved sealing connections between the fire bowl and upper portion or feed section of the furnace. At the present timeit is the usual practice to cement together the several sections of the furnace by means of a plastic material which hardens and seals the joints. Continuous expansion and contraction of the parts during use, however, causes this material to crack and break away thus permitting a leakage at the joints through which the fumes of combustion enter into the stream of heated air and are distributed through the building. My present invention provides sealing means whereby this difficulty is overcome.

In the drawing:

Figure 1 is a top view of a fire bowl constructed in accordance with this invention.

Figure 2 is a vertical diametric section of the fire bowl and sealing means.

Figure 3 is an enlarged section of a portion of the bowl and sealing means.

Figure 4 is an elevation on a reduced scale of a complete furnace.

The numeral 1 indicates a sheet metal drum which may be of cylindrical or inverted frustoconical shape, to adapt it to other portions of the particular furnace into which it is to be assembled. Secured to the upper portion of the drum 1 at the inside thereof by means of rivets or bolts 2 is the flange 3 of a T-section ring 4. The stem 5 of the ring extends outwardly over and in contact with the upper edge of the drum 1 and serves as a substantially horizontal rest for the lower edge of the upper or feed section 6 of the furnace. The drum 1 is provided with a refractory lining 7 which is preferably molded into the drum, the upper rim of said lining extending to and terminating even with the upper edge of the flange 8 of the ring. A channeled iron ring 9 is adapted to embrace the end of the substantially horizontal stem 5 ofthe T-section ring. The ring 9 isopen and is provided at its ends with lugs 10-10 for a bolt 11 by means of which it is tightly secured and clamped upon the horizontal portion 5 of the T-section ring. Insulating or sealing material 12, such for instance as asbestos, is placed between the horizontal portion 5 of the T-section ring and the section 6 of the furnace, and is further secured between the flange 8 and the channeled ring 9. This material effectually seals the joint between the fire bowl and the feed section of the furnace as will be apparent, and may at all times be kept tight by means of the bolt 11. An angle iron ring 13 is secured around the bottom of the drum and serves to reenforce the drum and as a rest for the refractory lining.

It will be understood that various modifications may be made in my invention as illustrated and above described, without departing from the spirit and scope thereof as defined in the appended claims.

Having thus fully described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A fire bowl comprising a sheet metal drum, a stiffening member at the upper portion of said drum, said member having'a flange extending substantially horizontally therefrom to serve as a support for the feed section'of a furnace, and a unitary channeled ring arranged to be clamped around said horizontal flange.

2. A fire bowl comprising a sheet metal drum, a stiffening member at the upper portion of said drum, said member having a flange extending substantially horizontally therefrom to serve as .a support for the feed section of a furnace, a unitary channeled ring arranged to be clamped around said horizontal flange, and a refractory lining for said drum. l

3. In a furnace means for forming a joint between the fire bowl and feed section, comprising a substantially horizontal flange extending around the upper portion of the fire bowl to serve as a support for the feedsection, a sealing pad between said flange and feed section, a unitary channeled ring, and means for clamping said ring around said flange.

Y 4. A fire bowl comprising a sheet metal drum, a T-section ring secured to the upper, inner portion of said drum with its stem extending substantially horizontally therefrom to serve as a support for the feed section of a furnace, and a 10 channeled ri'ng arranged to be clamped around the stem of said T-section ring.

5. A fire bowl comprising a sheet metal drum, a T-section ring secured to the upper, inner portion of said drum with its stem extending substantially horizontally therefrom to serve as a support for the feed section of a furnace, a channeled ring arranged to be clamped around the stem of said T-section ring, and a refractory lining for said drum.

JOSEPH DICKMAN. 

